scholarly journals Accounting of the temperature effect when measuring the instantaneous values of the gunpowder gases pressure in the bores of firearms

2018 ◽  
pp. 14-17
Author(s):  
О. Kriukov ◽  
I. Lysak
Keyword(s):  
Quantitative Estimation ◽  
Static Characteristic ◽  
Effect Of Temperature ◽  
Strain Gauges ◽  
Stabilization System ◽  
Temperature Stabilization ◽  
Measurement Results ◽  
Instantaneous Pressure ◽  
Instantaneous Values ◽  
Strain Gauge Sensor

The relevance of measuring of the pressure of gunpowder gases in the barrel channels of a firearm is noted. The main requirements for a pressure sensor for intra-ballistic measurements are considered. A review of the works in the field of strain gauges error modelling is given. The analysis of the static characteristic of the strain gauge sensor of instantaneous pressure values is carried out. For typical combinations of sensor parameters, a quantitative estimation of the temperature error is performed. To reduce the effect of temperature on the measurement results, it is suggested to take into account the correction in the measurement results, or to apply the temperature stabilization system.

Preparation, Installation and Signal Processing of Strain Gauges in Bridge Load Testing

2015 ◽  
Vol 725-726 ◽  
pp. 903-912 ◽  
Author(s):  
Rok Kamnik ◽  
Boštjan Kovačič ◽  
Andrej Štrukelj ◽  
Nikolay Vatin ◽  
Vera Murgul
Keyword(s):  
Signal Processing ◽  
Time Domain ◽  
Fourier Transformation ◽  
Concrete Beam ◽  
Measured Data ◽  
Strain Gauges ◽  
Fast Fourier Transformation ◽  
Load Testing ◽  
Strain Gauge Sensor ◽  
Bridge Load Testing

Practical approach of strain gauges using is introduced. The use of strain gauges and signal processing of measured data at static experimental load testing of a concrete beam are carried out. The ability of the strain gauge sensor to pick up the specific deformation / strain signals during loading is investigated. The Fast Fourier Transformation (FFT) is applied to obtain the signal in frequency domain and reverse FFT to transform the processed signal back to time domain. The measurements are confirmed with some inductive transducers and total station. This approach is tested on 2.7 m long concrete beam in laboratory. A practical use of strain gauges with bridge constructions under complex inspection is described.

Micro-hotplate based temperature stabilization system for CMOS SAW resonators

2009 ◽  
Vol 15 (8) ◽  
pp. 1187-1193 ◽  
Author(s):  
Anis Nurashikin Nordin ◽  
Ioana Voiculescu ◽  
Mona Zaghloul
Keyword(s):  
Stabilization System ◽  
Temperature Stabilization ◽  
Saw Resonators

scholarly journals Real-time monitoring of the rubber belt tension in an industrial conveyor

2022 ◽  
Vol 3 (1) ◽  
pp. 1-10
Author(s):  
Damian Bzinkowski ◽  
◽  
Tomasz Ryba ◽  
Zbigniew Siemiatkowski ◽  
Miroslaw Rucki ◽  
...  
Keyword(s):  
Measurement System ◽  
Uncertainty Estimation ◽  
Strain Gauges ◽  
Expanded Uncertainty ◽  
Belt Conveyor ◽  
Measurement Systems ◽  
Measurement Results ◽  
Rubber Belt ◽  
The Stability ◽  
Experimental Researches

The paper presents a novel system for monitoring of the work of industrial belt conveyor. It is based on the strain gauges placed directly on the roller surface that measure pressing force of the belt on the roller. Automatical operation of the measurement system minimizes impact of an operator on the measurement results. Experimental researches included the stability of indications during 5 days, Type A uncertainty estimation and equipment variation EV calculations. Expanded uncertainty calculated for the level of confidence 95% was below 0.1% of the actually measured value, and percentage repeatability %EV = 9.5% was obtained. It can be considered satisfactory, since usually it is required %EV < 10% for new measurement systems.

Determining the efficiency of functioning of systems of temperature stabilization of soils with horizontal evaporator filled with different refrigerants

2019 ◽  
Vol 5 (4) ◽  
pp. 37-57
Author(s):  
Alexey A. Ishkov ◽  
Anatoly A. Gubarkov ◽  
Gennady V. Anikin
Keyword(s):  
Carbon Dioxide ◽  
Soil Temperature ◽  
Negative Temperature ◽  
Frozen Soil ◽  
Temperature Fields ◽  
Positive Temperature ◽  
Stabilization System ◽  
Temperature Stabilization ◽  
Simultaneous Exposure ◽  
Frozen Soils

The construction of buildings and structures in the zones of distribution of frozen soils follows the principle I. The bearing capacity of frozen soils significantly depends on their value of negative temperature. When thawed, such soils shrink, which negatively affects the objects built on them. To prevent this, temperature stabilization systems for frozen soils are used. Simultaneous accounting of the thermal effect on the frozen soil of an engineering object, as well as the temperature stabilization system of soils, is a difficult task, the accuracy of determining the strength characteristics of the soil will depend on the correctness of its solution. This paper presents calculations of the temperature fields of frozen soils with simultaneous exposure to an object with intense heat (RVS with hot oil) and soil temperature stabilization system of the horizontal natural-acting tubular system (GET) type. The calculations follow the previously developed mathematical model of the temperature stabilization system with a horizontal evaporator. The authors consider the efficiency of the operation of the GET system charged with different refrigerants (ammonia and carbon dioxide) for different geocryological subzones of Western Siberia. Particular attention should be paid to the fact that the soil was initially at a close to positive temperature (−0,1 °C), but after calculating for 10 years, the entire soil mass around the evaporation part of the temperature stabilization system froze because of the soil temperature stabilization system. Systems charged with carbon dioxide showed better work efficiency. This is due to two factors: a lower value of the lower critical heat load, which gives more working days per year relative to the system charged with ammonia; and the evaporative part of the system on carbon dioxide, which has the average temperature 1 °C lower than ammonia systems. The results show that carbon dioxide as the heat carrier for the GET system is the most effective.

scholarly journals An automatic system for determining the effects of temperature on the hysteresis curves of ion-selective electrodes

1997 ◽  
Vol 19 (2) ◽  
pp. 39-44 ◽  
Author(s):  
Júlia M. C. S. Magalhães ◽  
Adélio A. S. C. Machado
Keyword(s):  
Computer Program ◽  
Automatic System ◽  
Water Bath ◽  
Effect Of Temperature ◽  
Temperature Cycle ◽  
Ion Selective Electrodes ◽  
Temperature Stabilization ◽  
Temperature Variations ◽  
Hysteresis Curves ◽  
Effects Of Temperature

This paper describes an automatic system which measures the effect of temperature variations on the response of ion-selective electrodes (hysteresis curves). The system is managed by a computer program which plots hysteresis curves following a pre-established temperature cycle, from setting and controlling the temperature of the water-bath, to acquiring the response potentials of up to five electrodes after temperature stabilization.

Principle of construction and characteristics of a gamma–spectrometer for radiometric imaging

2020 ◽  
Author(s):  
Boris G. Titov ◽  
◽  
Vladimir M. Gruznov ◽  
Keyword(s):  
Personal Computer ◽  
Field Measurements ◽  
Current Measurement ◽  
Temperature Stabilization ◽  
Gamma Spectrometer ◽  
Activity Distribution ◽  
Measurement Results

The principle of constructing a portable gamma spectrometer based on a BGO crystal with adaptive temperature stabilization of the response of the gamma spectrometer, topographic and time reference of measurement results, displaying the current measurement results and calculations on the screen of a tablet personal computer is proposed. The characteristics are confirmed by field measurements of the activity distribution of uranium, thorium, and potassium radionuclides.

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